Bartec PBTC-300, Operation And Installation Manual

Page: 41 / 52

Operation and Installation Manual PBTC-300
21-54C3-7D0002/-
01/2022-EHT-441169
Notice: Technical data subject to change without notice.
No claims for damage arising from alternations, errors or misprints shall be allowed.
Seite 39 / 49
Results:

Properly installed dry and clean trace heater sets should measure thousands of megohms, regardless of the trace heater
length or measuring voltage (0-2500 Vdc). Even if optimum conditions may not apply, all insulation resistance values
should be greater than the IEC 60079-30.1:2015 minimum recommendation of 20 megohms. However, BARTEC strongly
recommends a minimum reading of 1000 megohms. If the reading is lower or fluctuating, refer to section Troubleshooting
on page 22.

Insulation resistance values for Test 1 and 2; for any particular circuit, should not vary more than 25 percent as a function
of measuring voltage. Greater variances may indicate a problem with your trace heating system. Confirm proper installa-
tion and/or contact your local BARTEC representative for assistance.
After the measurement:
If trace heater meets all resistance criteria:

Reconnect the bus wires.

Reconnect any thermostat or controller.

Reenergize the circuit.
Function test of the thermostat module
The following steps must be carried out to perform the functional test of the thermostat module:

Temperature unit (°C or °F) on the changeover switch Set temperature unit

Remove quality inspection seal on rotary coding switch if necessary

Set the temperature setpoint at the rotary coding switch (enter the 100, 10, 1 digit digits, observe temperature control
range

Required tools: screwdriver 2,5mm

Switch on power supply

Check for error indications by means of LED status display, eliminate error if necessary
If the thermostat module is free of faults, i.e. if no LED status display shows error messages, a function test is recommendable. This
can be carried out by setting a higher and a lower temperature set point in comparison to the actual temperature at the Resistance
Temperature Device Pt100. This checks whether the thermostat module switches as expected at the corresponding temperature set
points. Measurement uncertainties and the preset hysteresis must be taken into account.
Required tools: Voltage tester
Test procedure:

Determine the actual temperature in the area of the Resistance Temperature Device Pt100

Connect voltage tester between terminals LH and N

Set the temperature setpoint at the rotary coding switch in such a way that the actual temperature in the area of the Re-
sistance Temperature Device is approached from a higher and lower temperature setpoint

Let the value of the temperature setpoint on the rotary coding switch overlap with the actual temperature near the re-
sistance thermometer

When the voltage tester is de-energized, determine the setpoint temperature value currently set on the rotary coding
switch
Switching behaviour of temperature controller test:
Situation Description Result
1 Temperature setpoint is higher
than current temp. at Pt100
voltage ap-
plied
2 Temperature setpoint plus hyste-
resis is lower than current temp. at
Pt100
no voltage
applied
3 Temperature setpoint is higher
than current temp. at Pt100
Voltage ap-
plied
The function test is successfully completed when the set temperature setpoint of the rotary coding switch corresponds to the value
of the actual temperature in the vicinity of the Resistance Temperature Device at the moment when the voltage tester is free of volt-
age.